Adding support for bower and reorganizing so when its used via bower it will be manageable for a dev.

bower_components/bootstrap/less/mixins/size.less

@@ -0,0 +1,10 @@
+// Sizing shortcuts
+
+.size(@width; @height) {
+  width: @width;
+  height: @height;
+}
+
+.square(@size) {
+  .size(@size; @size);
+}